Steam-boiler furnace



lmLAvfzm.` STEAM BUILER PURNAGB.

Patenteilly 14, l885.

FIGA.

(No Model.)

No. szzlgza'.

UNITED STATES PATENT GFFICE.

nionAnD LAvnnY, or BoSroN, MASSACHUSETTS.

STEAM-BCILER FURNACE.

SPECIFICATION forming prt of Letters Patent No. 322,298, dated July' 14, 1885.

Application filed December 22, 1884. (No model.)

T a/ZZ whom it may concern:

Be it known that I, RICHARD LAvERY, a citizen ofthe United States, residing at Boston, in the county of Suffolk and Sta-tc of Massachusetts, have invented certain new and i built up of fire-brick, which very soon becomes 5o front as viewed from the rear di stroyed in consequence of the greatvheat and the action of the firing-tools used in cleaning out the furnaces and breaking off the clinkers, Ste., resulting in great Waste of fuel and expensive repairs. The linings of the furnace are usually made of brick, and being unsupported soon go to pieces.

`It is the object of my invention to obviate these defects; and to that end the invention consists in constructing the linings of the furnace and fire-bridge in sections composed of metallic boxed frames, into which arepartially inclosed and held securely fire-brick or other suitable non-combustible material. The said boxed frames and non-combustible material are bolted separately to the front plate of the furnace to form the front lining of the furnace and to a baseplate to form the fire-bridge and the lining of the same, so that each or any section can be removed for renewal independently' of the others, whereby in case any portion of the furnace or fire-bridge lining becomes damaged or destroyed a new section can be expeditiously put in place. In the portion of the furnace-front comprising the aperture for firing, the boxed frames are constructed to perform the dual office of furnace-lining and mouth-piece, and are shown in the drawings -as applied to the furnace of atypical marineboiler now in general use to supply compound engines with steam.

Referring to accompanying drawings, which form part of this specification, Figure 1 represents a longitudinal vertical section through the furnace of a boiler embodying my invention. Fig. 2 is a front View of same. Fig. 3 is a transverse vertical section taken online x .fr Fig. l,showing the inner side of the furnaceof the furnace,

and also the aperture for firing. Fig. 41s a transverse vertical section taken on line y y of Fig. l, showing the front of the fire-bridge and baseiplate. Fig. 5 is. a perspective view of one of the metallic upper boxed frames or sections of furnace-front lining with the noncombustible material removed.A This section is one of the number forming the mouth of furnace or aperture for firing. Fig. 6 is a perspective View of one of the metallic sections of the Jdre-bridge lining and bridge.`

A represents a portion of a marine-boiler, of which B is the furnace, B the ash-pit, C thc front plate, and D the door. E is a base or dead-plate of metal,extending across the front of the furnace on a level with the'gratebars, and is secured to the front plate, C, by means of bolts and nuts e.

Resting upon the dead-plate E are the first of a series of metallic boxed frames (into which are incased the noncombustible material) coustituting the sections F F F, that form the lining and also the aperture or mouth of the furnace. These sections are made of such form as to securely hold a filling of dre-brick, G, or other non-combustible substance,and at the same time expose as little as possible of the metal to the action of the fire. Each of these Sections is secured to the front plate, C, by means of aV bolt and nut, f, so that should one section become damaged by unscrewing the nut from the bolt of said section the sec.

tion can be removed and replaced by a new one Without disturbing the others.

In the drawings I have shown the furnacelining and aperture or mouth as being composed of the dead-plate E and six frames or sections, F F F F F F, but the number and form of the sections. may be varied as required. At the rear of the furnace I place a bridge-wall composed of a base-plate, H, yof metal, made to fit the lower part of the furnace or ash-pit B. This base-plate is supported and held in position by means of chains h h, secured to the sides of the furnace.

IA prefer to make the base-plate H of T form and strengthen it'with ribs, as shown.`

To the top of the base-plate H, I secure a series of frames or sections, I, by means of bolts and nuts t'. These frames or sections I IOO prefer to make of Ythe form shown in Fig. 6, so that when secured in position they will form between them chambers or spaces, into which are fitted fire-brick K, or othcrsuitable non-combustible material, thus forming a firebridge lining and bridge that will expose very little of the metal work to the action of the heat, and which at the same time can be readily repaired should any of the sections become damaged.

I prefer to make the fire-brick blocks G and K so that their surfaces will stand slightly beyond the edges of therfranmes that hold them in position. By this arrangement I preserve the metal work from a very large amount of the action of the fire, thus causing them to last much longer than if not so protected.

It will be seen by the arrangements herein described that every or any part of the furnace and fire-bridge linings and fire-bridge can be readily removed and replaced by a correspond ing new portion, and thereby save time and expense.Y Y

I do not claim a mouth-piece composed of metal plates resting upon and interlocking with each other in flanged tongues and grooves for the purpose of protecting the brick walls of the f uruace from the wearing action of the tools while firing, as this has been used before; but

I do claim and desire to secure by Letters Patent- 1. The combination of the bridge-wall or base-plate H and the removable metallic in dependent boxed frames or sections I, as shown and described.

2. The combination of a furnace-lining and the aperture or mouth composed of boxed frames or sections (into which are partially embedded fire-briek or other noncombustible material) thatean be separately detached and replaced by new Ones, substantially as shown and specified.

3. In a marine or other boiler furnace, the combination of the front plate, C, the sections F F F, the fire-brick or other non-combustible material G, and the dead-plate E, substantially as and for the purpose shown and specified. Y

Ll. The combination of the sections I ofthe hre-bridge andthe filling of fire-brick Yor other non-combustible material, substantially as set forth.

5. In a marine or other boiler furnace, the independent boxed frames or sections F F F", holding ire-brick or other suitable non-combustible material, said sections being secured to the front plate, C, by means of bolts and nuts, and when in position serving in the dual capacity of furnace-lining and aperture or mouth for admission to the interior of the furnace, substantially as and for the purpose specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

Jos. H. Abm/rs, E. PLANTA, 

